Roof Math Formula

If a plan calls for a 6 12 pitch roof then the architect wants the slope of the roof to go up six inches for every 12 inches of horizontal run.

Roof math formula.

Formula this page offers you the rise and run formula to find the pitch slope angle of the roof of a building. Here are the equations you may use to solve for the length of the slope and the rafter. To figure out your roof s area a simple geometry can be used. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.

Below there is a simple triangle and the math used to work out. In the imperial unit of measurements the slope is expressed with the rise and run. In civil engineering the slope is the numerical measure of the steepness of a roof. By slope angle formula steepness can be obtained by dividing vertical rise by horizontal span.

Roof slope is also called as roof pitch. You can also calculate roof pitch even without using a roof slope calculator. Rafter rise run this formula is from the pythagorean theorem. They have to do this with a formula that takes into account the rise of the roof the vertical height and the run the horizontal length.

The maths behind this number is that it is the square root of rise run 2 1. Length of rafter suppose a roof has a rise of 18 inches and a run of 15 feet. Use the following formula which also describes a right triangle. The key is to be as accurate as possible since falling short or an overage could mean thousands of dollars when planning your roofing budget.

Slope measures the angle of change in elevation which can be obtained by dividing rise by run and multiply the result with 100. Roofing is measured in squares.